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Desktop computer not turning over, no beep codes, power light on

maximem

Posted 02 February 2015 - 08:56 PM

Appreciate anyone that can help troubleshoot this issue. This is my parent's computer and it has stopped turning on. I'm not sure if it is salvageable but I'd love to try before we write it off!

I am tech-savvy but not a computer expert by any means, especially hardware issues. I like to think that I'm good at following instructions and troubleshooting so any and all help is appreciated.

Desktop computer, Windows 7, at least 5 years old I think.

In the weeks leading up, the computer would have trouble turning over from sleep/hibernate. Often needed to power it off manually, turn off their power bar, then able to boot it up. Then one day it stopped turning over entirely.

Computer has been dead for a few months, haven't gotten to looking at it seriously. A few months ago, I did some troubleshooting. Tried to unset the battery on board (forgot what it is called, is it the Bios battery)? Was really hard to remove and I hope I didn't damage anything along the way. Popped it back in and nothing changed.

We took the harddrive out and plugged it into our own desktop, and we were able to get it working and access all of the data. So I think it isn't that.

When I press the power button:

Power light turns on

Fan starts

The computer just won't turn over, so nothing shows up on the screen

There are no beep codes to help me identify the problem

I can't force it to shut down after this by holding the power button - nothing happens. There is no on/off switch so I have to literally unplug for it to turn off.

This sounds like a power supply issue, from my googling. But honestly I don't really know what the power supply is! I thought it was the power plug by my husband seems to make fun of me when I said that

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Fusionbomb

Posted 03 February 2015 - 10:02 AM

The power supply is the "box" inside the PC where the power cord plugs into the back. Just google "power supply" and check the images.

If that is in fact the problem, the good news is that it should be easy/cheap to fix. If your computer is ~5 years old, and has no special hardware (for gaming, etc), then just about any wattage should work.

If you decide to test this, here are my recommendations:

1) Before removing the PSU (Power Supply Unit), make sure to note which wires are attached to which components on the motherboard. Sometimes, there are extra wires and it may be confusing if you didn't pay attention before removing it.

2) There should be a sticker somewhere on the PSU that details its wattage/etc (You may be able to read this without remove the PSU). Just make sure the new PSU you obtain has at LEAST that much wattage. I would imagine anywhere from 350W-500W would be more than enough for your older rig.

3) Another problem you may encounter is the size/fitting of a PSU replacement. Not all power supplies are the same size, but if you find another one with the same (or similar) watts, there's a good chance it might fit.

PS - The power supply may cost ~$50, depending on where you get it from. I've bought used ones off eBay for roughly $25-30.

phillpower2

Posted 03 February 2015 - 04:42 PM

Please do not replace anything atm as there are things that need to be checked out first, see my canned text below;

When I press the power button:

Power light turns on

Fan starts

The computer just won't turn over, so nothing shows up on the screen

There are no beep codes to help me identify the problem

I can't force it to shut down after this by holding the power button - nothing happens. There is no on/off switch so I have to literally unplug for it to turn off.

This suggests that power is present but I am not sure what you mean by "The computer just won't turn over" are you saying that the computer remains powered up but does not boot into Windows.

Please provide information about the computer,this includes is it a custom build or brand name such as Dell or HP, if it is a brand name provide the model name or series number (not serial) if a custom build post the brand and model name or number for the MB, Ram (including the amount) add on video card if one is used and the PSU (power supply unit) providing these details will enable us to better assist you.

maximem

Posted 03 February 2015 - 07:25 PM

maximem

Member

Topic Starter

Member

96 posts

Hi everyone,

Thanks for chiming in and helping out. I have taken a picture of the front & inside of the computer, as well as a video of when I turn it on. I don't even have a screen plugged into it right now because it won't turn over, won't boot up windows/nothing appears on the screen. You can hear when it turns on that it doesn't complete the turn on process, if that makes any sense.

Attached Thumbnails

maximem

Posted 03 February 2015 - 07:45 PM

Fusionbomb

Posted 03 February 2015 - 10:55 PM

Fusionbomb

Member

Member

634 posts

After watching the video, and from the limited info that I know about the machine, I am still leaning toward the issue being a bad PSU, for several reasons. Please keep in mind that I am just a random IT person on this forum, and not staff. You may want to disregard my posts/advice and heed that of phillpower2.

It is difficult to tell in the video, but one thing I was wondering about, is if any of the fans were spinning. If not, I would say I am 83% sure its the PSU.

If the fan on the PSU itself was actually spinning (the one on top, when looking at the back) it could still be a bad PSU, but I would be more hesistant to advise that you immediately go buy a replacement PSU to test fix.

My summary: If you can afford to "throw-away" however much the new power supply costs, then I would say try replacing it. If you're patient and want to listen to phillpower2, he may be better able to assist you and could possibly save you $.

maximem

Posted 04 February 2015 - 06:35 AM

maximem

Member

Topic Starter

Member

96 posts

Hey yes the fan is absolutely running strongly! Sorry I didn't mention it
I'm in no rush so happy for all advice and ideas before I head out to buy things, though I understand that it would help to narrow down the problems!

maximem

Posted 06 February 2015 - 11:14 PM

maximem

Member

Topic Starter

Member

96 posts

Thanks everyone for the valuable input! Now let's see how it went.

For the CMOS battery, that's the one step I had tried before. It was quite a pain to remove since the spring thing didn't work, I really had to force the plastic to get it out last time. So I haven't re-done that step.

For the graphics card, thanks I hadn't realised they had one! Well takng that thing out, there was a ton ton of dust in that fan. I cleaned it up and then assumed that maybe that's all it would take, so I put it back in before turning the computer back on. Something different happened, not better unfortunately. The computer started to turn on (the fans turned) but then quickly stopped. The fans don't get to full speed, everything just kind of dies, as if they don't have enough strength. Tried to power on again after, and nothing happens. Nothing happens until I unplugged the power and do it all over again.

So, at this point I removed the graphics card so that we can try with the onboard. Same situation happened: tries to start booting up and quickly stops. Actually you don't even here the sound of everything turning on, the fans just do a turn or two but you don't hear them actually accelerate.

So then i removed the graphics card again. Got to the ram. Took everything out, and then put just one in. Same situation as above. Put the other 3 back in and everything is the same again.

Did I break something? haha. In the meantime I also took out (using pliers) some chunks of dust from behind the inside fan (the one above the mother board I think? or processor).

maximem

Posted 07 February 2015 - 04:30 PM

maximem

Member

Topic Starter

Member

96 posts

Thanks Phil. All of the fans react the same, a small shot of energy and then they stop, never getting to full speed.
I removed the battery a few months ago (which was the last time I worked on this computer) and nothing changed with the computer. I'm not 100% sure that I had held the power button for as long as you are saying though, so I could try that again.
Should I remove the ram and the graphics card before doing that?
Also do you have any tips on how to remove the battery? I feel like I nearly broke the plastic last time. It's like the second picture in your example. What can I stick in it to help push it out that won't fling off and damage other things (and that isn't metal?). Any advice appreciated, I can even film me trying to remove it if it helps